醋酸中含溴会加剧金属孔蚀。
The existing of bromine in acetic acid could aggravate corrosion on metal hole.
本发明属材料技术领域，是一种多元金属孔化材料及其制备工艺。
The present invention belongs to the field of material technology, and relates to a multi-element metallic porous material and its preparation method.
设计了一种金属孔板波纹填料用刺孔机，包括上、下辊轮，刺辊，槽辊，减速系统。
It includes the up and down rolling wheel, thorny roller, groovy roller, reducing gears.
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